How to sharpen a knife without a whetstone

Honing is not sharpening

Honing is upkeep for an edge that is still mostly there — once the edge has worn flat, only sharpening can rebuild it. Shun puts the difference plainly: sharpening removes steel to form a new edge; honing is light maintenance done between sharpenings. Wüsthof, Zwilling, and Victorinox say the same. When honing no longer brings the edge back, the knife needs sharpening.

A sharpening service: someone else does it

The lowest-effort option. You bring the knives to a professional or mail them in and they come back sharp. No tools to buy, no angle to hold, no skill to build. Victorinox's own guidance: once or twice a year for most home cooks, with honing between sharpenings.

A service is the right answer for:

• Serrated knives. No home sharpener reaches inside the grooves of a serrated blade.
• A chipped edge. Grinding the blade back past a chip removes more steel than any touch-up tool is built for.
• A blade with an asymmetric bevel, or ground on one side only. A fixed-angle home sharpener will produce the wrong bevel. America's Test Kitchen's gyuto review says a knife with an uneven bevel needs hand sharpening on a whetstone, or a shop that specializes in Japanese knives.

The tradeoff is turnaround time and recurring cost. If you want sharp knives at home between services, a pull-through, an electric sharpener, or a rolling sharpener will do it. Who should buy a whetstone, and who should skip it goes deeper on when professional sharpening is the right long-term answer.

Pull-through sharpeners: set it and pull

You draw the knife through a V-shaped slot while the sharpener sits on the counter. The slot sets the angle; the abrasive inside grinds both sides of the edge in one pull. Speed is the main advantage.

What is in the slot matters. Carbide abrasives tend to grind more than the edge requires, leaving it rough. In America's Test Kitchen's 2025 test, diamond came out ahead. Ceramic sits between the two.

Not all knives are a good match. Yoshihiro advises against anything but a whetstone for its hard Japanese blades, citing the risk of damage to hard steel. Tojiro says a simple sharpener restores sharpness only for a while and recommends using one only for everyday upkeep between whetstone sessions. Most models have one fixed angle, so a knife ground at a different angle gets reground to the slot's angle the first time, which takes more passes and more steel.

Pull-through sharpeners: good or bad for knives examines what each slot type does to an edge and what knife makers say about using them.

Electric sharpeners: motor-driven, fastest per knife

An electric sharpener holds the angle through guide slots or spring-loaded arms while a motor turns the abrasive. You draw the knife through, usually in a stage or two, and the machine does the grinding. Because the powered abrasive works through a dull edge quickly, an electric sharpener handles a fully dull or chipped knife faster than a hand-held tool — and the tradeoff is that it removes more from each session, so it is less suited to routine touch-ups than to knives that are genuinely dull.

The machine's built-in angle determines what bevel your knife gets, so the same angle-matching consideration as with a pull-through applies: check whether it matches your knife before buying. Paring knives and steak knives that a rolling sharpener cannot reach go to a pull-through or an electric sharpener instead.

Rolling sharpeners: flat disc, two angles on one block

A rolling sharpener uses a magnetic block to hold the knife at a set angle, edge up, while you roll a disc along the blade. You sharpen one side of the edge, turn the knife, sharpen the other, then switch to the fine disc to polish. The angle is in the block, not in your hands.

Rollkeen's rolling sharpener has a 15° end and a 20° end on the same block: 15° for Japanese knives and thin blades, 20° for German and Western knives. The roller has two discs: 400 grit diamond on one end, 3000 grit ceramic on the other. If the knife is only slightly dull, start on the ceramic side: it takes off almost no steel. For a knife you use daily, a touch-up takes a few minutes; the first sharpen takes longest because the disc resets the edge to the block's angle before it can polish anything.

To see how the two most common tool types compare side by side, rolling sharpener vs pull-through sharpener draws both methods and walks through the differences.

Which option fits your situation

Some home cooks reach for an unglazed mug base, sandpaper, or a concrete step when no tool is at hand. None sets the angle: that part is in your hands, the same as on a whetstone, and the result varies. Any of the tools in the table sets it for you.